Species details: Click on each item to see an explanation of that item (Note: opens a new window)

Scrambling herb. Stems 4-angled, with spreading hairs, particularly when young. Leaves broadly ovate to almost round, velvety above, less so below; margins more or less regularly crenate-dentate, sometimes with smaller teeth on the crenations. Inflorescences terminal, branched. Flowers deep violet-blue, white in the throat and the basal part of the upper lip.